?url_ver=Z39.88-2004&rft_id=10.1068%2Fa130217&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Ledent%2C+J.&rft.aulast=Ledent&rft.aufirst=J.&rft.issue=2&rft.volume=13&rft.date=February+1981&rft.issn=0308-518X&rft.atitle=On+the+Relationship+between+Alonso's+Theory+of+Movement+and+Wilson's+Family+of+Spatial-Interaction+Models&rft.title=Environment+and+Planning+A&rft.pages=217-224&rft.genre=article